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andolf

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  1. Ok, well so I have I think I got most of it sorted out, I just have to work a bit more with CAD to get the networking working... I'll try to make a small build blog. but will probably be until the end of summer. Here's the rough outline: - Whiskey bottle case ca 210x100 mm in size( making the server a discrete addition to my living room/office or wherever it will end up. - Dell 240W laptop charger (19,5V 13A) (got one laying around, might go bigger) - An LK 75 heatsink from ELV.de : good for at least 240W if I understood right. - Up to 24 x NanoPi Neo Air( had the best arrangement of CPU/RAM/connectors) - A step-down converter for each pi on custom PCB (keep it simple: buy ready-made modules on eBay) - USB to ethernet and switches on custom PCB (drawback for Air as ethernet aren't exposed) - 1 or 2 60mm fans. I've made a rough estimated CAD: http://a360.co/2rsYFYm (viewable in 3D and able to explode all parts(8th button), the case is made transparent for easy viewing) if it all works with the 4 pi's I got, it's just a matter of buying more. I will also share the CAD if all works out, though not being a pro at this, Thinking of going wifi to the server, making it a bit slower to upload work and download results, but should be good enough for a test rig. infact thinking of going all wifi, to start with, before going all in on custom PCBs. anyways, ill let you know what happens, and I hope for rainy days;) /andolf
  2. Hi everyone, Im quite new to the NanoPi product line and gotta say that so far are they treating me well. I am planning on using a few of them in attempt to make a small Hadloop cluster, nothing fancy just for me to practice cluster codes before i jump on the big rig. anyhow to my question: Im planning on having 4 of them, to start with, sharing powersupply and heatsink. they are mounted on the heat sink (aluminium), and ive noticed the mounting holes are connected to ground. So as i share power source and the heatsink is a good conductur, i though about using the heatsink as common ground for the power. Is this to be recomended? or should i add regular ground cables as well and use plastic screws to isolate each board. what do you guys think? btw if you are curious I can tell more about the project. Andolf
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